Rotary grinding and polishing tool.



W. WHlTFORD.

ROTARY GRINDING AND POLISHING TOOL.

APPLICATION FILED JUNE 23. 1916.

1&04JO2. Patented Nov. 7, 1916.

2 SHEETS-SHEET I.

314 110.11 loa:

w. WHITIFORD.

ROTARY GRINDING AND POLISHING TOOL.

APPLICATION FILED JUNE 23. 1915.

1,29%,1 O2. Patented Nov. 7, 1916.

2 SHEETSSHEET 2.

WILLIS WHITFORD, OF VAWN, SASKATCHEWAN, CANADA.

ROTARY GRINDING AND I POLISHING TOOL.

anes.

Specification of Letters Patent.

Patented Nov. '3, 1916.

Application filed June 23,1916. Serial No. 105,426.

To all whom it may concern:

Be it known that I, WILLIS citizen of the United States, residing at Vawn, in the Province of Saskatchewan and Dominion of Canada, have invented certain new and useful Improvements in Rotary Grinding and Polishing Tools; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art Wnrrronn, a

to which it appertains to make and use the an improved and eflicient tool including anovel type of rotary head or holder for.de-

v tachably supporting various abrading and polishing tools. Another object is the provision of means for rotatably supporting the head or holder in the handle of the tool in such manner as to reduce friction and consequent wear of the parts to the mlnimum.

With these and other objects in view, the

invention consists in the novel construction, combination and arrangementof parts as will be hereinafter specifically described, claimed and illustrated in theaccompanying drawings, in which: 7

Figure 1 represents a side elevation of the improved tool, Fig. 2 represents a bottom plan view thereof, Fig. 3 represents a longitudinal sectional view through the tool, Fig.

4 represents a bottom plan view of the tool, the head or holder being removed, Fig. 5 represents a perspective view of several of the elements of the toolremoved from the handle and detached, Fig. 6 represents a plan view of the tool, the cap being removed, and Fig. 7 represents a detail sectional view on the line 77 of Fig. 2.

Referring to the drawings in detail, wherein similar reference numerals designate corresponding parts throughout the several views, the numeral 10 indicates a hollow handle of such external diameter as to be convenientlyheld in the hand of the operator and having one end enlarged, as indicated at 11, and provided with an annular flange 12.

A shaft13 is rotatably supported in the handle 10 and one end thereof protrudes through a cap 14 removably fitted upon the relatively small end of the handle and is adapted to be connected with a motor or 1 ably secures a bearing member 16 engaging bearing balls 17, which latter are mounted in an annular groove 18 the handle 10.

The end of the shaft 13 opposite the cap 14 is formed with a longitudinal slot ,18, removably receiving a triangular key 19 and the slotted portion of said shaft is formed w th external screw threads removably received within an internally screw threaded opening 20 formed axially within a circular head or holder plate 21. The head 21 is received within the annular flange 12 at the relatlvely large end of the handle and a plurality of bearing balls 22 are arranged between the headand the handle and are adapted to co-act with the bearing balls 17 to rotatably support the shaft 13 and head 21 in the handle.

The head 21 is formed upon its inner surface with a diametrical slot 23 adapted to receive the key 19, whereby the head is locked agalnst rotarymovement with relation to the shaft 13. The outer portion of the head is formed with a laterally projecting peripheral flange 24, having opposed lugs 25 adapted to engage in re cesses formed in corresponding relation in an abrading or polishing implement 26, which is of circular formation and is removably received within the flange 24 and is engaged with the head 21, as clearly shown in Fig. 3. The outer or working face of the implement 26 is of substantially conical formation and recesses 28 are formed in thev edge of the implement and are adapted to receive inwardly directed pins 29, carried by leaf springs 30 attached to the flange 24 of the head, whereby the abrading or polishing implement is rigidly secured in position upon the head 21. What I claim is:

1. A polishing and grinding tool comprising a hollow handle, a shaft rotatably supported in said handle having one end slotted, a head removably secured to the slotted end of said shaft, and a sleeve fitted in said slot and non-rotatably engaged with said head.

2. A rotary tool comprising a hollow handle, a'sha'ft rotatably supported in said handle having one end slotted, a head detachably secured to the slotted end of said shaft andhavinga diametrical slot therein, and a substantially triangular key fitted in the slots in said shaft and said head for nonpairs of diametricallylbs rotatably securing the latter against rotary movement upon said shaft.

3. A tool comprising a handle, a shaft rotatably supported within said handle, a

head detachably secured to said shaft having a laterally projecting flange, a surfacing element supported in saidvfiange and spring actuated pins carried by said flange and adapted to engage said surfacing element to secure the latter against removal.

4. A tool comprising a handle, having one end enlarged. and provided with depending flanges forming an annular recess, a shaft rotatably supported in said handle, an aperturedcap fitted over one end of said handle,

a head detachably secured to said shaft and partially fitted within the annular recess, and the depending flanges of the enlarged ends ofthe handle, and a surfacing element detachably secured to said head, said enlarged portion of the handle acting as a guide to prevent the hand from coming in contact with the surfacing element when in use.

In testimony whereof I ailix my signature in presence of two witnesses.

WILLIS WHITFORD. Witnesses:

A. MCKENNA-JOHNSTON, JOHN. P. WASSON. 

